Add File Manager and enhanced Queue features

File Manager:
- Add full File Manager page for browsing local library files
- Implement folder hierarchy with create/rename/delete operations
- Add file uploads with drag-and-drop support
- Enable adding sliced files directly to print queue
- Add linked folders with external path mounting

Queue Enhancements:
- Add plate selection for multi-plate 3MF files
- Add print options (bed levelling, flow calibration, vibration
  calibration, layer inspection, timelapse, use AMS)
- Fix print_count increment to only occur on actual prints

Testing:
- Add backend integration tests for library API (15 tests)
- Add backend integration tests for queue print options (8 tests)
- Add frontend tests for EditQueueItemModal (10 tests)
- Suppress console noise in frontend test suite

Closes #94

backend/tests/integration/test_print_queue_api.py

@@ -168,6 +168,81 @@ class TestPrintQueueAPI:
         assert result["archive_id"] == archive.id
         assert result["ams_mapping"] == [5, -1, 2, -1]
 
+    @pytest.mark.asyncio
+    @pytest.mark.integration
+    async def test_add_to_queue_with_plate_id(
+        self, async_client: AsyncClient, printer_factory, archive_factory, db_session
+    ):
+        """Verify item can be added to queue with plate_id for multi-plate 3MF."""
+        printer = await printer_factory()
+        archive = await archive_factory()
+
+        data = {
+            "printer_id": printer.id,
+            "archive_id": archive.id,
+            "plate_id": 3,
+        }
+        response = await async_client.post("/api/v1/queue/", json=data)
+        assert response.status_code == 200
+        result = response.json()
+        assert result["plate_id"] == 3
+
+    @pytest.mark.asyncio
+    @pytest.mark.integration
+    async def test_add_to_queue_with_print_options(
+        self, async_client: AsyncClient, printer_factory, archive_factory, db_session
+    ):
+        """Verify item can be added to queue with print options."""
+        printer = await printer_factory()
+        archive = await archive_factory()
+
+        data = {
+            "printer_id": printer.id,
+            "archive_id": archive.id,
+            "bed_levelling": False,
+            "flow_cali": True,
+            "vibration_cali": False,
+            "layer_inspect": True,
+            "timelapse": True,
+            "use_ams": False,
+        }
+        response = await async_client.post("/api/v1/queue/", json=data)
+        assert response.status_code == 200
+        result = response.json()
+        assert result["bed_levelling"] is False
+        assert result["flow_cali"] is True
+        assert result["vibration_cali"] is False
+        assert result["layer_inspect"] is True
+        assert result["timelapse"] is True
+        assert result["use_ams"] is False
+
+    @pytest.mark.asyncio
+    @pytest.mark.integration
+    async def test_update_queue_item_plate_id(self, async_client: AsyncClient, queue_item_factory, db_session):
+        """Verify queue item plate_id can be updated."""
+        item = await queue_item_factory()
+        response = await async_client.patch(f"/api/v1/queue/{item.id}", json={"plate_id": 5})
+        assert response.status_code == 200
+        result = response.json()
+        assert result["plate_id"] == 5
+
+    @pytest.mark.asyncio
+    @pytest.mark.integration
+    async def test_update_queue_item_print_options(self, async_client: AsyncClient, queue_item_factory, db_session):
+        """Verify queue item print options can be updated."""
+        item = await queue_item_factory()
+        response = await async_client.patch(
+            f"/api/v1/queue/{item.id}",
+            json={
+                "bed_levelling": False,
+                "timelapse": True,
+            },
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result["bed_levelling"] is False
+        assert result["timelapse"] is True
+
     @pytest.mark.asyncio
     @pytest.mark.integration
     async def test_get_queue_item(self, async_client: AsyncClient, queue_item_factory, db_session):